CONTENTS PROVIDING SYSTEM

摘要

A reproduction program is installed in a PC, and then a ripping key of a CD is provided from, e.g. an FD. By using the ripping key, the music contents in t he CD can be copied to a PD, but music contents cannot be downloaded from an EM D server and copied to a PD. If the music contents distributed from an EMD server is stored in a PD, a key for EMD different from the ripping key is acquired through a network and the reproduction program is executed. Thus, t he security of the contents data distributed through a network is enhanced.